EP3623636A1 - Système pour circulation de gaz dans de espaces annulaires de machines tournantes - Google Patents

Système pour circulation de gaz dans de espaces annulaires de machines tournantes Download PDF

Info

Publication number
EP3623636A1
EP3623636A1 EP18797718.6A EP18797718A EP3623636A1 EP 3623636 A1 EP3623636 A1 EP 3623636A1 EP 18797718 A EP18797718 A EP 18797718A EP 3623636 A1 EP3623636 A1 EP 3623636A1
Authority
EP
European Patent Office
Prior art keywords
gas
pump
ejector
fluid
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18797718.6A
Other languages
German (de)
English (en)
Other versions
EP3623636B1 (fr
EP3623636A4 (fr
Inventor
Lafaete CREOMAR LIMA JUNIOR
Anderson MOITA WITKA
Eduardo WONG CARDOSO
Heloisa Helena DA SILVA FOLHADELLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FMC Technologies do Brasil Ltda
Original Assignee
FMC Technologies do Brasil Ltda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FMC Technologies do Brasil Ltda filed Critical FMC Technologies do Brasil Ltda
Publication of EP3623636A1 publication Critical patent/EP3623636A1/fr
Publication of EP3623636A4 publication Critical patent/EP3623636A4/fr
Application granted granted Critical
Publication of EP3623636B1 publication Critical patent/EP3623636B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132—Submersible electric motors

Definitions

  • the present invention is a system for injecting gases into air gaps of rotating machines, through an ejector, pump and a motor.
  • Such system may be used in subsea equipment, subsea pumping, subsea engines, subsea compressors, rotating machines.
  • the production of reservoir fluids typically contains a mixture of hydrocarbons, gas and oil, along with water and sand.
  • the largest fraction of oil production is obtained, which is the most profitable component, while the water fraction is lowest.
  • the well production curve over the time describes significant inversion with which fluid fractions are produced. Throughout the well lifetime there is a need for using artificial lifting methods so that the recovered oil fraction remains profitable.
  • Subsea pumping encompasses different technologies of motors and pumps, in order to match equipment functions to system requirements, and its characteristics, such as required head pressure ("head”), fluid composition, fraction of gas (“gas volume fraction” - GVF), viscosity, WC variations ("watercut”), presence of emulsions and representative amounts of sand.
  • head head pressure
  • fluid composition fraction of gas
  • viscosity WC variations
  • watercut watercut
  • Helical-axial and centrifugal hydraulics have been adopted by the market for subsea pumping.
  • Subsea pumps have been used in deep water depths, e.g., above 1000 m, and may be located inside the oil well or in subsea bed. From the aforementioned applications, the adoption of centrifugal pump may require a well drilled exclusively for its installation, which receives the production of reservoir fluids, coming from production well, and may also require the gas be separated to achieve remain gas contents acceptable to enter the pump without causing any damage.
  • centrifugal pumps can tolerate around 20% of gas volume fraction in production stream to be pumped. Intervention on equipment when it is installed inside a well is very costly when compared to intervention on equipment when it is installed in a seabed, even causing production interruption.
  • the helical-axial hydraulic pumps have greater tolerance to the gas fractions to be pumped along with liquid fractions and, moreover, are installed in a subsea bed.
  • a pumping or compression system consists of a motor and a pump or compressor itself.
  • the motor rotor is coupled to the pump shaft and may be the same shaft in some applications.
  • the pump or compressor is also composed of a rotating part, coupled to the shaft, called impellers, which are components responsible for transferring energy to the fluid, in addition, the pump has static components, called diffusers, whose function is to condition the flow.
  • impellers rotating part coupled to the shaft
  • diffusers static components
  • Electric motors used to drive devices where pressurized process fluid is present must be designed to prevent process fluid from entering the motor.
  • One solution is to separate the motor and pump into individual housings so that any leak is collected outside the system.
  • housings In a subsea system, housings generally communicate with each other, having a mechanical seal as a barrier between them. However, because it is a dynamic seal, a small leakage of fluid occurs from the high-pressure side to the low-pressure side. This seal is then pressurized by the motor side with a barrier fluid, causing a leak in the pump direction.
  • barrier fluid should have controlled electrical characteristics, generally being a dielectric mineral oil, contaminant-free and with controlled water concentration.
  • Some systems may use fluids with softer specifications, for example, in coiled wire motors, where electrical fluid characteristics are not crucial.
  • Barrier fluid can be either a fluid with well-defined electrical characteristics such as a dielectric mineral oil, or a fluid with softer specifications, such as where motor windings are wired. In addition to the main barrier function, this fluid also has the secondary function for cooling the motor.
  • the barrier fluid system requires that it be installed on topside utilities, a skid with hydraulic panels and an umbilical-connected mineral fluid reservoir for continuous supply of barrier fluid to subsea equipment. The need for a barrier fluid system results in operational supervision and cost to operation since barrier fluid is consumable and requires periodic replacement.
  • barrier fluid has the disadvantage: the requirement for a dedicated system for surface unit fluid supply, typically located on the platform Turret, occupies umbilical lines with fluid transfer to the motor, requires operators' supervision and maintenance, consumes platform energy.
  • barrier fluid which is most often a liquid, also presents significant losses due to the drag generated by the relative movement between the static and the rotating part. Therefore, the presence of a viscous fluid in the motor gap may mean a low efficiency for a large diameter or high-speed motor and may make the machine operation impracticable.
  • a second solution is to drain the gap constantly, removing mainly gas.
  • the process fluid pressure is greater than the gap pressure, causing the process fluid leak to gap, therefore this drain is also responsible for removing this liquid and directing it to another point of the system.
  • the present invention relates to a system for injecting gas into the air gaps of rotating machines ("air gap") (20), such system comprises the use of a pump (32), a motor (18) and an ejector (10).
  • air gap air gap
  • the present invention has two embodiments.
  • the first embodiment features a system (30) which allows a reduction in fluid viscosity in the air gap ("air gap") (20) between rotor (28) and stator (26) of motor (18), wherein this low viscosity fluid (12) coming from discharge (58) of ejector (10), where this low viscosity fluid (12) is the result of mixing a gas (08) from the gas-extraction unit (24) of pump (32) with a motivation fluid (48) coming from discharge (14) of pump (32).
  • the second embodiment features a system (40) allowing for reduction of viscosity of fluid in air gap ("air gap") (20) between rotor (28) and stator (26) of motor (18), wherein a gas (08) from a gas-extraction unit (24) circulates through air gap ("air gap") (20) and thereafter through an ejector (10) the fluid (12) flows to the process line upstream of pump (32).
  • the present invention describes systems for injecting gas into the air gaps of rotating machines ("air gap") (20), such systems comprise the use of a pump (32), a motor (18) and an ejector (10).
  • air gap air gap
  • the present invention by way of illustration, will describe two embodiments.
  • the present invention uses an ejector (10) which is an equipment for suctioning or pressurizing fluids, as can be seen in Fig. 1 , the ejector (10) consisting of a converging nozzle (02) ("nozzle") having a motivating inlet (22) and a narrowing (16) in its outlet, further provided with a perpendicular suction inlet (54), said converging nozzle (02) and suction inlet (54) both being interconnected to a throat (04) where the mixture of suction gas (08) and motivation fluid (48) occur, and said throat (04) being continued by a diffuser (06), which is responsible for the pressurization of mixture of gas (08) and motivation fluid (48) and therefore conditioning the discharge fluid (12) to the required pressure.
  • a converging nozzle (02) ("nozzle") having a motivating inlet (22) and a narrowing (16) in its outlet, further provided with a perpendicular suction inlet (54), said converging nozzle (02) and suction inlet
  • the low pressure generated causes a pressure differential between the suction inlet (54) and the throat (04), receiving fluid at certain P s e Q s (suction pressure and flow) by means suction inlet (54).
  • a diffuser (06) is responsible for converting speed again into pressure, and thus the pressure in discharge (58) of ejector (10) may be sized intermediate the motivation pressure and suction pressure.
  • the invention described below encompasses two embodiments using an ejector (10), in order to provide separate gas recirculating through air gap (20) ("air gap").
  • the first embodiment of the system for injecting gas into the air gaps of rotating machines (30), represented by the schematic in Fig. 2 , comprises an ejector (10) which uses as motivation fluid (48) the discharge fluid line (36) of pump (32), said ejector (10) being connected to discharge line (36) through pipe (44).
  • the embodiment of system (30) also comprises a pump (32) having in its constitution a gas-extraction unit (24) responsible for extracting from the fluid of the process line (34), the gas (08) to be used by the ejector (10).
  • the embodiment of the system (30) also has a motor (18) consisting of a stator (26) and a rotor (28), wherein this rotor (28) is coupled to shaft of pump (32), and wherein rotor (28) surrounded by stator (26) forms an air gap (20) ("air gap").
  • a motor (18) consisting of a stator (26) and a rotor (28), wherein this rotor (28) is coupled to shaft of pump (32), and wherein rotor (28) surrounded by stator (26) forms an air gap (20) ("air gap").
  • the mixture of gas (08) and motivation fluid (48) occurs in throat (04) of ejector (10) and then is pressurized by diffuser (06) and injected in air gap (20) between rotor (28) and stator (26) by means of a pipe (38).
  • the fluid from discharge (12) of ejector (10) contains very high GVF ("gas volume fraction") content, such characteristic conditions the gas, along with some remaining fluid, to be mostly circulated by air gap ("air gap") (20) through a pipe (38), and therefore, a very low viscosity fluid in air gap ("air gap”) (20) is obtained, which implies in minimal drag losses, to which the rotating and static surfaces may be subjected to.
  • GVF gas volume fraction
  • air gap (20) Following the discharge fluid circulates through air gap (20), it is injected in process line (34) through a pipe (42) upstream of pump (32).
  • process line (34) Following the discharge fluid circulates through air gap (20), it is injected in process line (34) through a pipe (42) upstream of pump (32).
  • air gap air gap
  • Such configuration may be used in systems requiring a fluid be circulated with high pressure by air gap ("air gap”) (20), and accordingly certain liquid amount may be received and drained from air gap (“air gap”) (20).
  • the second embodiment of the system for injecting gas into the air gaps of rotating machines (40), represented by the schematic in Fig. 3 , comprises an ejector (10) which uses, as motivation fluid (48), the discharge fluid line (36) from pump (32), said ejector (10) being connected to the discharge line (36) through pipe (44).
  • the embodiment of system (40) also comprises a pump (32) having in its constitution a gas-extraction unit (24) responsible for extracting fluid from process line (34), the gas (08).
  • the embodiment of system (40) also has a motor (18) consisting of a stator (26) and a rotor (28), wherein such rotor (28) is connected to the shaft of pump (32), and wherein rotor (28) surrounded by stator (26) forms an air gap (20) ("air gap").
  • a motor (18) consisting of a stator (26) and a rotor (28), wherein such rotor (28) is connected to the shaft of pump (32), and wherein rotor (28) surrounded by stator (26) forms an air gap (20) ("air gap").
  • Said gas (08), from gas-extraction unit (24), is sucked by ejector (10), via suction inlet (54), in order to circulate in air gap (20) before being pressurized by ejector (10).
  • the gas-extraction unit (24) is connected to the air gap (20) of motor (18) through pipe (50), and air gap (20) of motor (18) is connected to suction inlet (54) of ejector (10) through pipe (52).
  • Ejector (10) is responsible for mixing the gas (08) coming from air gap (20) with motivation fluid (48), said mixing occurs in throat (04) of ejector (10) and afterwards it is pressurized by diffuser (06) and injected in process line (34) through pipe (38) connecting the discharge (58) of ejector (10) to said process line (34) upstream of pump (32).
  • the gas (08) does not circulate with very high GVF, however when air gap (20) sucks gas (08) from gas-extraction unit (24), a very low viscosity fluid circulates in air gap. Therefore, this configuration may be used in systems where the operating pressure in air gap ("air gap") (20) is approximately equal to suction pressure of pump (32).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18797718.6A 2017-05-10 2018-05-09 Système pour circulation de gaz dans de espaces annulaires de machines tournantes Active EP3623636B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102017009824-9A BR102017009824B1 (pt) 2017-05-10 2017-05-10 Sistema para circulação de gás em espaços anulares de máquinas rotativas
PCT/BR2018/050152 WO2018205002A1 (fr) 2017-05-10 2018-05-09 Système pour circulation de gaz dans de espaces annulaires de machines tournantes

Publications (3)

Publication Number Publication Date
EP3623636A1 true EP3623636A1 (fr) 2020-03-18
EP3623636A4 EP3623636A4 (fr) 2021-01-13
EP3623636B1 EP3623636B1 (fr) 2024-09-11

Family

ID=64104107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18797718.6A Active EP3623636B1 (fr) 2017-05-10 2018-05-09 Système pour circulation de gaz dans de espaces annulaires de machines tournantes

Country Status (4)

Country Link
US (1) US11603861B2 (fr)
EP (1) EP3623636B1 (fr)
BR (1) BR102017009824B1 (fr)
WO (1) WO2018205002A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11876434B2 (en) 2021-09-03 2024-01-16 Dana Limited Air gap scavenging system for oil cooled electric motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11201524B2 (en) * 2019-06-26 2021-12-14 Hamilton Sundstrand Corporation Motor cooling systems
DE102021118253B4 (de) * 2021-07-14 2023-02-02 Man Energy Solutions Se Strömungsmaschinenanordnung

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB888211A (en) 1956-12-05 1962-01-31 G & J Weir Ltd Improvements in or relating to pumps
US3514167A (en) 1968-07-03 1970-05-26 Caterpillar Tractor Co Venturi-type oil seal system for engine crankshafts or the like
US3698839A (en) * 1970-10-14 1972-10-17 Borg Warner Pressure equalizer for unloading a compressor during start-up
US5165248A (en) * 1991-09-03 1992-11-24 Carrier Corporation Oil reclaim in a centrifugal chiller system
CH686525A5 (de) * 1992-07-02 1996-04-15 Escher Wyss Ag Turbomaschine .
EP1069313B1 (fr) * 1999-07-16 2005-09-14 Man Turbo Ag Turbo-compresseur
NO323324B1 (no) 2003-07-02 2007-03-19 Kvaerner Oilfield Prod As Fremgangsmate for regulering at trykket i en undervannskompressormodul
GB2443117B (en) 2003-12-20 2008-08-13 Rolls Royce Plc A seal arrangement
US7181928B2 (en) * 2004-06-29 2007-02-27 York International Corporation System and method for cooling a compressor motor
US20080260539A1 (en) 2005-10-07 2008-10-23 Aker Kvaerner Subsea As Apparatus and Method For Controlling Supply of Barrier Gas in a Compressor Module
NO328277B1 (no) * 2008-04-21 2010-01-18 Statoil Asa Gasskompresjonssystem
US8899912B2 (en) * 2009-01-15 2014-12-02 Dresser-Rand Company Shaft seal with convergent nozzle
TWI577949B (zh) * 2013-02-21 2017-04-11 強生控制科技公司 潤滑及冷卻系統
BR102013009262B1 (pt) 2013-04-16 2021-03-09 Fmc Technologies Do Brasil Ltda estação integrada de produção submarina e processo de separação de água, òleo, gás e sólidos
US9874230B2 (en) * 2014-04-15 2018-01-23 Dresser-Rand Company Gas takeoff isolation system
GB2536291A (en) * 2015-03-13 2016-09-14 Caltec Ltd Jet pump
ITUB20152564A1 (it) * 2015-07-28 2017-01-28 Nuovo Pignone Tecnologie Srl Motocompressore e metodo per migliorare l’efficienza di un motocompressore

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11876434B2 (en) 2021-09-03 2024-01-16 Dana Limited Air gap scavenging system for oil cooled electric motor
US12132381B2 (en) 2021-09-03 2024-10-29 Dana Limited Air gap scavenging system for oil cooled electric motor

Also Published As

Publication number Publication date
US20200340495A1 (en) 2020-10-29
US11603861B2 (en) 2023-03-14
BR102017009824A2 (pt) 2018-12-04
EP3623636B1 (fr) 2024-09-11
EP3623636A4 (fr) 2021-01-13
WO2018205002A1 (fr) 2018-11-15
BR102017009824B1 (pt) 2023-12-19

Similar Documents

Publication Publication Date Title
CN105408581B (zh) 在井下和地面生产多相井流体的组合式泵和压缩机及方法
RU2659594C2 (ru) Многоступенчатый центробежный насос с интегральными износостойкими упорными осевыми подшипниками
US11603861B2 (en) System for the circulation of gas in airs gaps of rotating machines
WO2018077527A1 (fr) Pompe polyphasique et procédé de fonctionnement de ladite pompe
US20070187110A1 (en) Method and apparatus for production in oil wells
CN108119100A (zh) 油井举升系统及其抽油方法
US12221868B2 (en) Electric submersible pump (ESP) shroud system
US20140174756A1 (en) Artificial lift method for low pressure sagd wells
US10385673B2 (en) Fluid driven commingling system for oil and gas applications
US20190093654A1 (en) Downhole motor-pump assembly
US12163525B2 (en) Subsea pump system with process lubricated bearings
JP6903539B2 (ja) 圧縮機
US12503933B2 (en) Electric submersible pump gas evacuation system
WO2018057960A1 (fr) Ensemble motopompe de fond de trou
RU61369U1 (ru) Компоновка погружной насосной установки
Brandt et al. Multiphase downhole screw assembly (MDA)-A new chapter in conveying hydrocarbons

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20191206

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

A4 Supplementary search report drawn up and despatched

Effective date: 20201211

RIC1 Information provided on ipc code assigned before grant

Ipc: F04F 5/04 20060101ALI20201207BHEP

Ipc: F04D 29/58 20060101ALI20201207BHEP

Ipc: F16C 33/72 20060101ALI20201207BHEP

Ipc: F04D 29/10 20060101AFI20201207BHEP

Ipc: F16J 15/40 20060101ALI20201207BHEP

Ipc: E21B 33/00 20060101ALI20201207BHEP

Ipc: F04F 5/16 20060101ALI20201207BHEP

Ipc: F04F 5/54 20060101ALI20201207BHEP

Ipc: F04D 25/06 20060101ALI20201207BHEP

Ipc: F04F 5/20 20060101ALI20201207BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20221110

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230523

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240409

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018074300

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20241212

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20241211

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20241211

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20241212

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1722909

Country of ref document: AT

Kind code of ref document: T

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250113

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602018074300

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20250401

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NO

Payment date: 20250509

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20250422

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250401

Year of fee payment: 8

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20250612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602018074300

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: H13

Free format text: ST27 STATUS EVENT CODE: U-0-0-H10-H13 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20251223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20250509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20250531

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20250531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20250509

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20251202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20250531